/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMCompiler/RigVMAST.h
Specialized cast for type checking for a External Variable /FRigVMExternalVarExprASTexpression will raise if types are not compatible
this expression cast toFRigVMExternalVarExprAST
template<> const [FRigVMExternalVarExprAST](API\Plugins\RigVMDeveloper\RigVMCompiler\FRigVMExternalVarExprAST) * To() const